細節
An 18th-Century boxwood sector,
unsigned, with stamped numerals and incised scales on both faces and edge, with brass hinge, each arm 24in. (61cm.) long; and a boxwood alidade rule by J.H. STEWARD, LONDON, with folding brass sights -- 18¼in. (46.4cm.) long
See Illustration (detail) (2)
unsigned, with stamped numerals and incised scales on both faces and edge, with brass hinge, each arm 24in. (61cm.) long; and a boxwood alidade rule by J.H. STEWARD, LONDON, with folding brass sights -- 18¼in. (46.4cm.) long
See Illustration (detail) (2)